Institution: | 1. Department of Histology and Embryology, Medical Academy, ul. Swiecickiego 6, Pl-60-781, Poznań, Poland 2. Department of Histology and Embryology, Medical Academy, ul. Chalubinskiego 6a, PL-50-368, Wroclaw, Poland 3. Regional Centre of Oncology, ul. Garbary 15/19 PL-60-Poznań, Poland
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